1.used twin wire pvc and reflective pvc togather 2.hook name of article:red and white warming stripthe size:3.741*0.15mcolor:red and whitethe sapce between red and white is 24.8cmApplication: it is can be used in outdoors,in behind of big truck,it also can be hung in the outside of building when it built,or it can be used in periphery of working-yard.used twin wire pvc togather with reflective ...